Imaging lens

Abstract

An imaging lens including a lens group, a lens barrel and at least one light shading plate; the lens barrel includes first barrel wall forming light aperture, second barrel wall which is bended and extends from first barrel wall, internal wall and external wall, N clamping positions are provided in circumferential direction on internal wall, each clamping position includes M equally spaced bosses on internal wall; surface of boss toward first barrel wall is supporting surface, horizontal height of boss in same clamping position are identical but different from horizontal heights of bosses in other clamping positions; M clamping slots configured to fit bosses in any clamping position at the same time and avoiding slots configured to accommodate bosses in remaining clamping positions, which are equally spaced, are provided in circumferential direction on light shading plate spaced from adjacent lens located at a side of first barrel wall.

What is claimed is: 
     
       1. An imaging lens, comprising:
 a lens group having at least two lenses, 
 a lens barrel comprising a first barrel wall which forms a light aperture and a second barrel wall which is bended and extends from the first barrel wall, and further comprising an internal wall and an external wall corresponding to the internal wall, wherein at least two clamping positions are provided in a circumferential direction on the internal wall of the second barrel wall, each of the clamping positions comprises equally spaced at least two bosses which are provided on the internal wall; and 
 a light shading plate provided between any two adjacent lenses; 
 wherein the boss comprising supporting surfaces to fit the light shading plate, the supporting surfaces are totally back to the first barrel wall, and a horizontal height of the bosses in a same clamping position is identical with each other, while being different from horizontal heights of the bosses in other clamping positions; 
 at least two clamping slots configured to fit all the bosses in any one of the clamping positions at the same time and avoiding slots configured to accommodate all the bosses in remaining clamping positions, which are equally spaced from each other, are provided in a circumferential direction on the light shading plate, and there is a gap between the light shading plate and an adjacent lens located at a side of the first barrel wall, the clamping slots are respectively engaged with the clamping positions of different heights to adjust the gap. 
 
     
     
       2. The imaging lens as described in  claim 1 , wherein the boss and the lens barrel are integratedly formed as a whole. 
     
     
       3. The imaging lens as described in  claim 2 , wherein the supporting surface is a horizontal plane. 
     
     
       4. The imaging lens as described in  claim 1 , wherein a depth of the avoiding slot is greater than a maximum height of the boss. 
     
     
       5. The imaging lens as described in  claim 1 , wherein a depth of the clamping slot is smaller than a minimum height of the boss. 
     
     
       6. The imaging lens as described in  claim 1 , wherein an adjacent lens at a side of the light shading plate toward the first barrel wall is fixed with the lens barrel via glue dispensing. 
     
     
       7. The imaging lens as described in  claim 1 , wherein the number of the clamping slots is equal to the number of the bosses in each of the clamping slots, and the sum of the number of the clamping slots and the avoiding slots is greater than or equal to the sum of the number of the bosses of the clamping positions. 
     
     
       8. The imaging lens as described in  claim 1 , wherein the supporting surfaces only abuts the light shading plate.